Apparatus for drying dough and pastry goods.



0. WIRZ. APPARATUS FOR DRYING DOUGH AND PASTRY GOODS. APPLICATION FILEDMAY s, 1907.

l: 992,320 Patented May 16,1911.

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' nml OTTO WIRZ, 0F CANNSTATT, GERMANY, ASSIGNOR T0 THE FIRM OF WERNER8c PFLEIDERER, OF CANNSTATT, GERMANY.

Specification of Letters Patent.

Patented May 16, 1911.

Application filed May 8, 1907. Serial No. 372,512.

To all whom it may concern:

Be it. known that I, Orro VIRZ, chief engineer', and a subject of theRepublic of Switzerland, a resident of Cannstatt, in the Kingdom oflViirtemberg and German Empire, have invented a certain new and usefulApparatus for Drying Doughs and Pastry Goods, of which the following isa specification.

The drying` of doughy bakery goods, suoli as macaroni, broad noodles,thread shaped noodles, rolls, small lunar shaped breads and the like,was eected heretofore particularly in the open air and at a lowtemperature, which necessitated a considerable amount of air for thedrying, besides requiring large rooms for this purpose, which could notbe used for any other purposes.

This invention refers to an apparatus for the drying of dougliy bakerygoods in a closed box by artificially circulated air, means beingprovided for changing the direction of the currents of air, whereby arapid intense drying of the doughy bakery goods takes place and only asmall space is required for the entire drying apparatus. n

The subject matter of the invention is shown in longitudinal sectionupon the accompanying drawing in several embodiments which only differfrom each other in minor details, the invention residing particularly inproviding within the interior of a closed room or space a number ofboxes, in which the doughs to be dried are placed. These boxes which arearranged in series one above the other, are positioned in such a manner,that air circulating passages are formed between the severalrows ofboxes by means of sutliciently wide spaces. The said passages incombination with movable or stationary closing means make it possible,to change the way of circulating the air through the doughs, placed inthe boxes, without any chance of fissures being formed in the doughs.

In the drawings: Figure l illustrates a more or less conventional andvertical section through a drying apparatus constructed in accordancewith the present invention. Fig. 2 is a similar view illustrating aslightly modified construction.

Referring to the drawings and particularly to Fig. l it will be seenthat the material to bedried is arranged in a room or chamber a., theseveral containers f being grouped into a plurality of separatedvertical stacks or series. A conduit o has its ends connectedrespectively with the top and bottom of the chamber a. In the form ofinvention shown in Fig. l a series of vertical partitions 7L areprovided between the several stacks, and the channels or passagesseparating the said partitions from the adjacent stacks are closedalternately at the top and bottom as indicated at Zz. In c a reversibleventilator is provided, which is connected to 'the upper and to thelower openings of the channels or passages L by means of air admissionand aspirating passages b. When the air is drawn in the direction of thearrow through the upper channel or passage Z) by the ventilator, the airpasses from above into the passages to the right of the intermediatepartitions z, it then passes through the drying boxes from left to rightand escapes through tlie next channels situated to the left of theintermediate partitions, from which it flows into the lower airaspirating channel or passage o and continues to circulate in the mannerhereinbefore described. By means of slides represented at o arranged toopen and close apertures w providedin the channels or passages o, Z), insuitable places, the drying air, which becomes gradually heated andsaturated with moistuiay'1beunixeltli""outsideJ air or may be replacedby such, so that it becomes again adapted to absorb moisture.

'Ihe modilication according to Fig. 2 is similar to the modiicationaccording to Fig. l, with the difference only, that the spaces7i betweenthe drying boxes f are constructed without partitions, the entiresectional area of the spaces being closed alternately one above and theother below, by means of closing lids Z, so that the air admission andair escape passages are in common for each two of the adjoining rows ofdrying boxes. At c the reversible aspirator is also arranged, which isconnected to the upper and lower openings of the channels or passages71, between the drying boxes by means of the air admitting andaspiration channels or passages Z). Vhen the air is passed by theventilator in the direction of the arrow through the channels o, o, theair enters the channels 7L which are open on top and thence it flows oneither side into the drying boxes f, so as to escape and become unitedinto one stream at the opposite sides of the drying boxes j into thechannels 7L which are opened at the bottom, Whereafter the air passesinto the air. aspirating channel. Upon reversing the aspirator, thedrying air passes in the reverse direction.

Vhat I claim and desire to secure by Letters Patent of the United Statesis l. In a dough or pastry drying apparatus, the combination of a dryingchamber, a con duit having its ends connected respectively with the topand bottom of said chamber, holders for articles to be dried arranged insaid chamber in a plurality ot separated vertical stacks or series,means for causing a current of air to pass through the conduit andchamber, and means :tor causing the current to be deflected through thestack in the chamber in parallel.

2. In a dough or pastry drying apparatus, the combination of a dryingchamber, a conduit having its ends connected respectively with the topand bottom of said chamber, holders for articles to be dried arranged insaid chamber in a plurality of separated'vertical stacks or series, a:tan arranged Within the conduit and adapted to cause a current of airto pass through the conduit and chamber, and means Within the latter forcausing such current to pass laterally through the stacks in parallel.

3. In a dough or pastry drying apparatus, the combination ot a dryingchamber, a conduit having its ends connected respectively with the topand bottom of said chamber, holders for articles to be dried arranged insaid chamber in a plurality of separated vertical stacks or series, areversible fan adapted to cause a current of air to pass through theconduit and chamber in either direction, and means adjacent the ends ofthe stacks in the chamber for causing the air current to pass inparallel through the stacks.

4. In a dough or pastry drying apparatus, the combination of a dryingchamber, a conduit having its ends connected respec tively with the topand bottom oi' said chamber, holders for articles to be dried arrangedin said chamber, in a plurality of separated vertical stacks or series,vertical partitions between the different stacks, means permanentlyclosing the spaces between each partition and the adjacent stacksalternately at the top and bottom, and means for caiising a current ofair to pass through the conduit and chamber.

In witness whereof, I have hereunto signed my name in the presence oftivo subscribing Witnesses.

OTTO VVIRZ.

fitnesses ERNns'r ENTEN MANN, FRANZ DiussNnn.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

